Lock



June 14, 1932. D. PuDAVlS 1,863,396

LOCK Filed July 16, 1929 4 Sheets-Sheet l June 14, 1932.-

DAVls LOCK Filed July 16, 1929 4 Sheets-Sheet 2 D. P. DAVIS June 14, 1932.

LOCK

4 Sheets-Sheet 5 Filed July 16', 1929 "v June 14, 1932. p, DAVIS 1,863,396

6, 1929 4 eeeee s$heet 4 Patented June 14, 1932 UNITED STATES PATENT OFFICE DONALD P. DAVIS, OF HOUSTON, TEXAS, ASSIGNOR OF FOUR AND ONE-HALF PER CENT T BEN H. JOHNSTON, FOUR AND ONE-HALF PER CENT T0 H. DI. DUNCAN, SIX PER CENT TO JAMES H. DREHER, ALL OF HARRIS COUNTY, TEXA$; TWO PER CENT TO L. J. R-ASHBAUM, OF KANELAS CITY, MISSOURI; ONE PER CENT TO HARRY GUSTINE AND TWO PER CENT TO W. D. O. LUCY, BOTH OF HARRIS COUNTY, TEXAS LOCK Application filed Jul 16,

This invention relates to new and useful improvements in a lock.

One object of the invention is to provide a locking apparatus of the character described particularly applicable to a motor vehicle and designed for the purpose of locking the ignition switch in open position, and for closing the gasoline supply line, when the vehicle is not in use, so as to effectively prevent the unauthorized use of the vehicle.

Another object of the invention is to provide an apparatus of the character described embodying a controlling device whereby the switch completes or breaks the ignition circuit from the battery to the spark plugs may be opened and closed and the gasoline supply line leading to the carburetter may be closed when said switch is opened and opened when the switch is closed, all in combination with a manually shiftabl-e mechanism normally locking said device in position to hold the switch open and to block said gasoline line, but shiftable into a selected position to permit said controlling device to be operated to 1 effect the closing of said switch and the opening of the gasollne line.

A further feature of the invention resides 1n the provision of a keyless combinatlon locking device which in its adaptation to a motor vehicle embodies a manually operated controlling mechanism which, when the look ing device is unlocked, is capable of being shifted to one position to close the ignition circuit and simultaneously open the gasoline line to the carburetter and upon being shifted to another position, breaks the ignition cir cuitand simultaneously closes said gasoline line and upon being shifted a third position releases the locking mechanism which thereupon automatically operates to lock or maintain the ignition circuit open and to maintain the gasoline supply line closed.

The apparatus herein described has been illustrated as applied to a motor vehicle and operable for the purposes stated, but it is to be observed that the disclosure, and its application, is by way of illustration only; the apparatus is capable of general application and usewherever desired.

lVith the above and other objects in view 1929. Serial No. 378,666.

this invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings, where- Figure 1 shows a longitudinal sectional view of the device.

Figure 2 shows an end view.

Figure 3 shows a cross sectional view taken on the line 33 of Figure 1.

Figure 4: shows a cross sectional view taken on the line 44- of Figure 1.

Figure 5 shows a cross sectional view taken on the line 55 of Figure 1.

Figure 6 shows a cross sectional view taken on the line 66 of Figure 1.

Figure 7 shows a cross sectional view taken on the line 77 of Figure 1.

Figure 8 shows a fragmentary cross sectional View taken on the line 88 of Figure 1, and

Figure 9 shows a side elevation of the com plete apparatus as applied to a motor ve hicle. 7

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures, the numeral 1 designates an inclosing casing, preferably box like in form, which may be attached to the instrument board 2 in case the lock is used on a motor vehicle. lVithin the casing and preferably mounted adjacent the respective ends thereof are spur gear wheels 3, 4, the hub 5 of the former of which is extended through and has a bearing in the front wall of the casing and splined on the hub outside of the casing there is a ro tatable dial plate 6 having perforations 7 through which the numbers of the dial 8 on the adjacent end of the casing are visible. The dial plate is maintained on said hub by means of a suitable lock nut 9 which is en closed by means of a suitable bracket 10 which is extended down and attached to the casing beneath the dial plate. There is a central bearing shaft 11 one end of which is extended through a bearing in the hub 5 and bracket 10 and attached to said end there is an operatin lever 12 which is secured on said shaft by means of the lock nut 13. The other end of this shaft has a bearing in the inner end of the casing and the said gear 4 is loosely mounted on said shaft 11. Located between the gear wheel 3 and the adjacent end of the casing 1 there is a spiral spring 14 one end of which is attached to the casing and the other'end of which is attached to said gear wheel 3 and this spring is protected by a housing 15. There is a longitudinal shaft 16 which has the end gear wheels 17, 18 fixed thereon and which is mounted to rotate in the brackets 19 depending from the top of the casing. The gears 17 and 18 are in mesh with the respective gear wheels 3 and 4 and rotation is imparted from the gear wheel 3 through the gear 17 and the shaft 16 and the gear 18 to the gear wheel 4 so that these gear wheels 3 and 4 will be simultaneously rotated.

There is a selector shaft 20, whose ends are journaled in suitable longitudinally align ed bearings in the respective gear wheels 3, 4 and there is a coil spring 21 around said selector shaft, one end of which is attached to the adjacent gear wheel 4 and the other end of which is attached to said selector shaft, said coil spring operating to hold the selector shaft normally in a given position and elfecting its return to said position when the shaft is turned out of said normal position. Fixed on said selector shaft 20 there is a ratchet wheel 21 and there is a pawl 22 pivotally mounted on the inner side of the gear Wheel 3 and normally held in position to engage said ratchet wheel by the flat spring 23, said pawl normally preventing said return movement-of said selector shaft when said shaft has been actuated as hereinafter described. Adjacent said pawl and depending from the top of the casing there is a bracket'24 having the vertically aligned bearings 25, 25- in'which the bar 26 is slidably mounted;

Attached to the bar 26 there is a lock bolt 27 which works through a slot in the bracket 24 and whose end rests on the annular track 28 on the inner face of the gear 3. Surrounding the bar 26, and interposed between the bolt 27, and the bearing 25there is a coil spring 29 which rests on said last mentioned hearing. The lower end'of the bar 26 is overturned forming a lug 31, and fastened to the shaft 11 there is a cam 32 which operates over said lug 31 and is effective to cooperate therewith to pull the bar 26 downwardly when it is desired to clear the locking mechanism as later set forth. When said shaft 11 is turned, for said purpose, the bolt 27 will be moved downwardly into a marginal notch 33 in the gear wheel 3 and will engage against the pawl 22 releasing the same from the ratchet wheel 21, and permitting the selector shaft-20 to return to its normal positi on, andsaid bolt at the same time will lock the gear wheel 3, and through it, the gear wheel 4, against rotation during the return movement of the shaft 20.

Fixed on the shaft 11 are the cam Wheels 34, 35 which have the aligned cam shaped slots 36, 37, respectively therein and in these slots work the roller bearings 38,39 which are carried by the depending arms 40, 41 of the lock bar 42. The inner face of the gear wheel 4 has an annular concentric track 43 and the adjacent end of the lock bar 42 has a roller 44 thereon, which runs on said track and which is provided for a purpose to be here inafter specified.

Loosely mounted on the shaft 11 are the locking units designated generally by the numerals 45, 46, 47 and 48. Four of these units are shown in the present illustration although a greater number or a lesser num-' ber may be employed. These units are similar in construction and in mode of operation. Each unit embodies a hub portion 49. This portion has an annular housing 50 preferably formed integrally therewith and on the other side there is a similar annular housing 51 which maybe fastened to the hub portion by suitable set screws. Each hub portion 49 is polygonal in form and fitted thereover and clamped between the corresponding housings 50, 51 there is a locking disk 52, each disc being provided with a marginal notch 53. V

The brackets 19 are arranged in pairs with the locking units disposed between the brackets of'each pair. The shaft 11 works in hearings in the lower ends of-said brackets and the lock bar 42 works in oblong bearings 54 of said respective brackets. The selector shaft 20 has the outwardly extending dogs 55, 56, 57 and 58*arranged to cooperate, as hereinafter explained, with the respective locking units 45, 46, 47 and 418. Pivotally mounted on an extension 50 of the annular housing 50, of each of said respective units are the pawls 59, 60, 61 and 62 whose outer ends are overturned forming the bearing faces 59, 60', 61 and 62 respectively, which are aligned with the corresponding dogs 55, 56, 57 and 58. The inner ends of these pawls are normally held by means of pull strings as 63, against opposing stops as 64. carried by the extensions 50 of the corresponding annular housings 50, and these stops limit the movement of the corresponding pawls in one direction and the springs 63 yield to permit their movement in the other direction. Within each housing 50 there is a spiral spring 65 attached at one end to the adjacent housing 50 and at the other end to the corresponding bracket 19.

Fastened on the shaft 20 there is aratc-het wheel'66 and arranged to cooperate therewith is a pawl 67 which is yieldably mounted on a bracket 68 which is secured to and depends from the top of the casing 1. This pawl Ill 67'is connected to the bracket 68 by a one way hinge which limits the movement of the pawl 67 in one direction but permits it to yield in the other direction.

Each housing 51 has the internal ratchet teeth 69 and pivotally mounted on the adjacent bracket 19-are the pawls 70. The pivoted end of each pawl has a-depending arm 71 to which a pull spring 72 is attached,

which normally operates to hold the pawl in position to be engaged by the teeth 69.

As shown in Figure 1, the apparatus is locked with the switch in open position and the gasoline line leading to the carbureter closed. If itbe now desired to close the switch and open the gasoline so that the vehicle can be started, the dial plate 6 must be actuated, or partially rotated four times, that is, must be given the predetermined combination of partial rotations.

The finger of the'operator is inserted in the required openings 7 and the dial plate 6 is moved each time until stopped bythe bracket 10 and upon release at the end of each partial rotation will be returned to original position by the spring 14. Upon the first actuation-of the dial plate the selector shaft 20 will be partially revolved about the shaft 11. As the shaft 20 revolves the ratchet wheel 66 will engage against the pawl 67 and the shaft 20 will be partially rotated to bring the dog 55 into position to engage against the face 59 of the pawl 59 and as the shaft 20 further revolves, said dog 55 will engage said face 59 and will turn the corresponding locking unit including the disc 52 so as to align the notch 53 thereof underneath the lock bar 42. Said disc 52 will be held in said position by pawl 70 engaging with an appropriate tooth 69 of said housing 51 and the shaft 20 will be held against return rotation by the engagement of the pawl 22 against an appropriate tooth of the ratchet wheel 21; Upon the second actuation of the dial plate 6 the selector shaft 20 will be revolved as before, the ratchet wheel 66 engaging and being partially turned by the pawl 67 'as above explained to carry the dog 56 of the shaft 20 into position to engage the face 60 of the pawl 60 and the corresponding locking unit 46 including its disc 52 will be partially turned to align the notch 53 thereof underneath the lock bar 42. The shaft 20 will be held against reverse rotation as hereinbefore stated by the pawl 22 and said disc 52 will be held in said position by the engagement of the corresponding pawl 7 O with an appropriate tooth 69 of said housing 51. Upon the third partial rotation of the dial plate 6, the selector rod 20 will be again swung around with a partial revolution, the ratchet wheel 66 being partially turned by the pawl 67 tov carry the dog 57 into position to engage the face 61 of the pawl 61 and the correspondinglocking unit 47 including its disc 52 will be partially rotated to align the notch 53 thereof underneath the lock bar 42. The shaft 20 will be held against reverse rotation as above explained by the pawl 22 and the said disc 52 will be held in said position by the engagement of the corresponding pawl 70 with an appropriate tooth 69, of the corresponding housing 51. Upon the fourth partial rotation of the dial plate 6 'the'selector shaft 20 will be again partially revolved and will also be partially rotated by the'engagement of the ratchet wheel 66 with the pawl 67 as hereinbefore explained to carry the dog 58 into position to engage the face 62 of the pawl 62 and as selector shaft 20 further revolvesthe corresponding locking unit 48 including its disc 52 will be partially rotated to carry the notch 53 thereof in alignment underneath the lock bar 42. The pawl 22 will again operate to hold the shaft 20 against reverse rotation and the corresponding pawl 70 will engage in appropriate tooth 69 of the housing 51 to hold said disc 52 in said last mentioned position. After each of said partial revolutions the selector shaft returns to its original position, as above explained, the pawl 67 yielding to permit the ratchet wheel 66 to pass upon each return. The notches 53 are now in alignment and all aligning underneath the lock bar 42. The lever 12 may be manually moved, to the left, a partial rotation and this will operate throughthe cam slots 36, 37 to pull the bar 42 downwardly into the aligning notches 53, the roller 44 at the same time moving downwardly into notch 73 of the track 43. Vvhen said roller 44 is in said notch, the gear wheel 4 will be locked against rotation and this will operate through the gear 18, the shaft 16, gear wheel 17 and the gear wheel 3 to hold the dial plate 6 against movement. Depending from the top of a casing 1 there is an arm 74 to which a bell crank is pivoted. One arm 75 of this bell crank is connected, through the link 76, to the lock bar 42 and the other arm 77 of said bell crank is pivotally connected with a 'slidably mounted shift bar 7 8. \Vhen the lock bar 42 moves downwardly as explained, said bell crankwill be operated by the link 7 6 to shift the bar 78 and to carry the contact plate 79 into contact with the contact plate 80. Suitable wiring 81, 82 is connected to these respective plates, of which one wire may lead to the battery and the other to the distributor.

A contact is thus made connecting the battery of the vehicle with the spark plugs. A gasoline line 83 leads from the vacuum tank to the carbureter and incorporated therein is a valve casing 84 in which is a slide valve closethe gasoline line 83,bi1t when the switch 31 7.8 is actuated to close the switch, the valve will be moved to align the channel 86 witl1 the line 83' to permit-delivery oft-he gasoline to the carburetor.

It is obvious that any device to be opera-ted, such as a lock bar, may be. connected either directly or indirectly to the bar 42 nd operated thereby for the purpose of looking or operating any device to be operated- If-it be now desired to open the switch, the lever 12 may moved back to its original position, which will operate through the cam Slots. 36, 37 to. lift said bar and this willopcrate through the bell crank to shift the bar 7 8 into position to open the switch without afiecting the locking discs 52 so that the said lever 12 may again be operated to close the sts itch-as already explained. If, however, it

be desired to lock said switch in open posi-L tiOm-the selector and locking units should be'cl-eared, .that is, the lever 12 should be moved in an anticlockwise direction. hen so turned, the pins 87 of the respective looking units engage against the arms 71 of the pawls 70 and will release said pawls from the/corresponding teeth 69 so that the springs 65'1nay return the locking units including their discs 52 to their original position with theirnotches 53 out of alignment with each other: and with the lock bar 42. The pins 87 project upwardly from the shaft 11 and are actuated against the arms 71, as it turns, anticlockwise... When the shaft 11 is so turned, the cam 32 also simultaneously pulls the bar 26 downwardly causing the bolt 27 carried thereby to release the pawl 22 from the ratchet wheel 21, said b.0lt27 at the same time looking in thenotch of the gear wheel 3 so as to lock said gear wheel against move ment with the result that the selector, shaft will be held in such position that it is returned to its original position by the spring 21, it will not clash with the pawls 59 to 62.

It will thus be seen that when the lever 12 is moved into position to close the switch or into the opposite position to clear the selector and locking units then the dial plate, and the gears 33, 4 will be locked against operation.

WVhen the dial plate 6 has been given a predetermined number of partial rotations, an additional partial rotation, or rotations thereof-Will be ineffective, for the reason that the blank side 88 of the ratchet wheel 66 will pass idly by the pawl 67 without rotating the shaft 20 and the dogs of the selector shaft 20 are so arranged apartthat upon such additional partial revolution or revolutions of the shaft 20 that neither of the dogs carried by the selector shaft 20 will engage with the pawls of the locking units.

When the lever 12 is moved in a clockwise direction, with the dial plate 6 in a normal position, the roller it will lock in the notch 73 and thus lock the gear wheels 3, 4 andthe dial plate 6 against mov-ement'and if the dial plate is first moved out of normal position before moving the'lever12 the 'I'Q11BT 44;W-ll1 ride on the track 43 as to locksaid lever 12 against movement. It is therefore obvi? ous that when the dial plate 6 is being 01181" ated the roller 44 riding on the track hi'will hold lock bar 42 spaced ab ve the-discs 52 This is important for if the locking bar 42 contacted with Said discs .52 While the locking units45 to 48 are being operated, the lever 12,.could be held in such position as to operate through the cam grooves 36, .37 to hold the lock bar 42closely against the discs- 52 and then upon operation ofthe dial plate 6 as the respective notches 53 came into'aligir meat with the bar .42 there w uld be a. slight click and by notingv the dilfe'rent positions-of the dial 6 at which said clicks would occur, the combination could be asce tained in an unauthorized manner..,

As, hereinbefore stated, the hubs 4:9 are polygonal and the discs 5.21am fitted-closely over said corresponding hubs, as shown in Figure 8, to the end that the discs 52 may be shiftedin their relative positions on the cor responding hubs and the combination thus. changed. This shifting of the discs 52 may. be accomplished in anobv'ious manner by separating the housings .50, 51 and making the proper adjustments and then again-securing said housing together.

The apparatus hereinabove described does not require the use of a key for operating the same,is not affected by gravity and does not utilize gravity in its operation, can not be; readily tampered with or operated by. unauthorized persons and which is of such construction that the combination of movements for its operation can be readily chaugedif desired.

. I have shown what I now oons-ider'to be a preferred form of one embodiment of the invention, by Way of illustration, but it is obvious that mechanical changes may be made and equivalents substituted for the parts shown Without departing from the principle of the invention as defined by the appended claims.

' What I'claim is:

1. A device of the character described in: cluding a casing, a bar therein, means in cluding a shaftfor manually shifting saidbar, a plurality of locking units in the easing on said shaft, each unitineluding means which in one position prevents the actuation of said bar, other means forlocking said bar to prevent the shiftingthereof, and manually operable means forselectively operating said units and said locking-means into positionto release said bar. 1

2. A device of the character described including a casing, a bar therein, means in eluding a shaft for manually shifting said bar, a plurality of locking units in the casing on said shaft, each unitincluding means to prevent the effective actuation of said bar, other means for locking said bar to prevent the shifting thereof, and manually operable means for selectively operating said units into position to permit actuation of said bar and also for releasing said locking means, and operative connections between said bar and a device to be operated, or locked, thereby.

A device of the character described including a casing, an actuator therein, means for manually operating said actuator, means operatively connecting the actuator to a device to be actuated thereby, a plurality of locking units associated with the actuator and having means movable into position to prevent the effective movement of the actuator and also movable into position to permit the manual operation thereof, manually operable means effective to operate said units, in a predetermined order of succession, to move the same into said last mentioned position and releasable means normally locking the actuator against movement and movable by said manually operable means into released position upon said actuation of said manually releasable means.

4. A device of the character described including a casing, an actuator therein, means for manually operating said actuator, means operatively connecting the actuator to a device to be actuated thereby, a plurality of locking units associated with the actuator and having means movable into position to prevent the efi'ective movement of the actuator and also movable into position to permit the manual operation thereof, means for locking said actuator against operation, manually operable means effective to operate said units, in a predetermined order of succession, into position to permit said movement of the actuator, means for retaining said units in said last mentioned position, means operatable from said actuator operating means and effective to release said locking means to permit said actuator to operate.

5. A device of the character described ino eluding a casing, an actuator therein, means 5 including a shaft for manually operating said actuator, means operatively connecting the actuator to a device to be actuated thereby, a plurality of locking units on said shaft and associated with the actuator and having actuator controlling means movable into one position to prevent effective operation of the actuator and also movable into another position to permit the manual operation thereof,manually operable means effectlve to operate said units, in a predetermined order of succession, to move said controlling means into said releasing position, means for retaining saidcontrolling means in such other position, means operatable from said actuator operating means effective to release said retaining means to permit said controlling means to return to their initial position, and means for returning said controlling means, when so released, to such initial position.

6. A device of the character described including a casing, an actuator therein, means including a shaft for manually operating said actuator, means for connecting. the actuator to a device to be operated, a plurality of locking units on said shaft and associated with the actuator and having controlling means relatively shiftable into active posi-. tions to prevent said actuator from effective movement and into other or inactive positions to permit movement of the actuator, manually operable means effective, by successive movements, to operate said units, in a predetermined order of succession, into said inactive positions to permit movement of said actuator.

7. A device of the character described including a casing, an actuator therein, means for manually operating said actuator, means for connecting the actuator to a device to be operated, a plurality of locking units associated with the actuator and having control ling means relatively shiftable into active positions to prevent effective operation of the actuator and into other, or inactive, positions to permit movement thereof, manually operable means efieetive, by successive movements, to operate said units, in a predetermined order of succession, into active position to effect said release of said actuator, and

releasable means retaining said units in said Y inactive position and releasable locking means normally locking the actuator against movement and operatively connected with and releasable by said unit operating means.

8. A device of the character described including a casing, an actuator therein, means for manually operating said actuator, means for connecting the actuator to a device to be operated, a plurality of locking units associated with the actuator and having controlling means relatively shiftable into positions to prevent effective movement of the actuator and into other positions to permit movement thereof, means for locking the actuator against movement, manually operable means effective, by successive movements, to operate the controlling means of said units, in a predetermined order of succession, into position to permit movement of said actuator and to simultaneously release said locking means,

releasable means retaining said units in said releasing position, means operatable from the actuator-operating means and efiective to release said retaining means to permit the controlling means to return into position to prethe actuator-operating means and effective to release said retaining means to permit the 5 controlling means of said units to return into position to prevent movement of said actuator,-an'd means for returning said controlling means, when so released,ito said last named positions. i

10. A device of the character described including-a casing, an actuator therein, operative connections through which the actuator may be connected to a device to 'be operatedthe'reby, means for manually operating the actuator, means for locking the actuator against movement, a locking unit in the casing having controlling means operable, into active position to prevent effective movement of the actuator-and into inactive position to permit actuation thereof, manually operable means effective to operate said controlling means into said inactive position and for simultaneously releasing said locking means.

11. A device of the character described including a casing, an actuator therein, operative connections through which the actuator may be connected to a device to be operated thereby, means for manually operating the actuator, a locking unit in the casing having controlling means operable, into active position, to prevent effective movement of the actuator and into inactive position to permit actuation thereof, manually operable means effective to operate said controlling means into said inactive position, and means through which one manual means is locked in inoperative position While the other manual means is being operated. V

12, A device of the character described including a casing, an actuator therein, means including a shaft for manually operating the actuator, a plurality of locking units on said shaft and having controlling means associated With the actuator and eifective, in active position,- to prevent actuation of the actuator, manually operable means effective, by a predetermined number of successive operations, to operate said controlling means, successively, into said inactive position to permit actuation of said actuator.

13. A device of the character described including'a casing, an actuator therein, means for manually operating the actuator, a plurality of locking units having controlling means associated with the actuator and eiiec tive, in active position, to prevent movement of the actuator, manually operable means effective, by a predetermined number of suc cessive operations, to release said locking means and to operate said controlling means successively, into inactive position to permit actuation of said actuator, said locking units being capable of adjustment to vary the range of such successive operations.

14. A device of the character described including a casing, an actuator therein, means including a shaft for manually operating said actuator, means for connecting the actuator to a device tobe operated, a plurality of look ing units on said shaft and having controlling means associated with the actuator and rela tively shiftable into active positions topre vent effective operation of the actuator and into inactive positions topermit movement thereof, manually operable means effective, by successive movements, to operate said controlling means, in a predetermined order of succession, into said inactive position to per-- mit movement of said actuator, some of said units being capable of adjustment to permit relative variations of the range of said successive movements; v Y

15. A device of the character described in+ eluding a casing, an actuator therein, means for manually operating said actuator, means for locking the actuator against rotation, a plurality of locking units associated with the ctuator and having controlling means relatively shiftable into active position to p re-v vent movement of the actuator and in; active positions to permit movement thereof, a manually operable mechanism eifective by a predetermined number of successive move ments to operate said unitsinto inactive position and to simultaneously release lock.- ing means, said mechanism being so formed that movements thereof in excess of said pre determined number will be ineiiective.

16. Apparatus of the character described including a suitable. support, an actuator, means for manually operating said actuator, releasable meansfor positively locking the actuator against movement, a pluralityof units associated vviththe actuator and having controlling means relatively shiftable into active position into the path of movement of the actuator, to prevent the efiective movement of said actuator, and into inactive po sition, a manually operable mechanism eflective, by a predetermined number of successive movements, to operate said controllin means into inactive position out of the pati of movement of the actuator and simultaneously to release said locking means, said controllingmeans permitting the released actuator to be eflectively moved when said controlling means are in said inactive position, and operative connectionsthrough which the actuator may be connected to a device to be operatedthereby. in

17. Apparatus of the character described including a support, an actuator therein, operative connections through which the actuator may be connected to a device to be oper- 5 ated thereby, means for manually operating said actuator, said means including a shaft, a plurality of locking units on the shaft and associated with the actuator and having controlling means relatively shiftable into acw tive position to prevent actuation of the actuator and into inactive position to permit such actuation, a manually operable mechanism effective, by a predetermined number of successive movements to operate said controlling means into inactive position, an actuator locking device operable by said manually operable mechanism into position to release the actuator when the controlling means are in inactive position whereby the actuator 20 may operate said device.

In testimony whereof I have signed my name to this specification.

DONALD P. DAVIS. 

